Methods of using cement compositions comprising high alumina cement and cement kiln dust

ABSTRACT

The present invention provides cement compositions that comprise water, high alumina cement, a soluble phosphate, and cement kiln dust. The cement compositions optionally may be foamed with a gas. Methods of cementing also are provided that comprise: providing the cement composition; introducing the cement composition into a location to be cemented; and allowing the cement composition to set therein. The location to be cemented may be above ground or in a subterranean formation.

BACKGROUND

The present invention relates to cementing operations and, moreparticularly, to cement compositions comprising high alumina cement, asoluble phosphate, and cement kiln dust (“CKD”), and associated methodsof use.

Cement compositions may be used in a variety of subterraneanapplications. An example of a subterranean application that utilizescement compositions is primary cementing whereby pipe strings, such ascasing and liners, are cemented in well bores. In performing primarycementing, a cement composition may be pumped into an annular spacebetween the walls of a well bore and the exterior surface of the pipestring disposed therein. The cement composition sets in the annularspace, thereby forming therein an annular sheath of hardened cement(i.e., a cement sheath) that supports and positions the pipe string inthe well bore and bonds the exterior surface of the pipe string to thewalls of the well bore. Cement compositions also may be used in remedialcementing operations, for example, to seal cracks or holes in pipestrings, to seal highly permeable zones or fractures in subterraneanformations, and the like. Cement compositions also may be used insurface applications, for example, construction cementing.

Cement compositions used heretofore in subterranean applicationscommonly comprise Portland cement. Drawbacks may exist to using Portlandcements in certain applications, however, because they are prone tocorrosive attacks by carbonic acid. Other hydraulic cements also may beprone to corrosive attacks by carbonic acid. Carbonic acid may benaturally present in a subterranean formation, or it may be produced inthe formation by the reaction of water and carbon dioxide when thelatter is introduced into the formation, for example, during a carbondioxide enhanced recovery operation. Carbonic acid is believed to reactwith calcium hydroxide that is produced by hydration of Portland cementpotentially causing the deterioration of the set cement. This may beproblematic, for example, because it may increase the permeability ofthe set cement. In some instances, the degradation of the set cement maycause loss of support for the casing and undesirable interzonalcommunication of fluids.

The susceptibility of some hydraulic cements (e.g., Portland cement), todegradation by carbonic acid may be especially problematic in hightemperature wells (e.g., geothermal wells). The term “high temperature,”as used herein, refers to wells having a static bottom hole temperatureabove about 200° F. Because the high static well bore temperaturesinvolved often coupled with brines containing carbon dioxide, thesehydraulic cements may rapidly deteriorate. In geothermal wells, whichtypically involve high temperatures, pressures, and carbon dioxideconcentrations, set cement failures have occurred in less then fiveyears causing the collapse of well casing.

It has heretofore been discovered that cement compositions comprisingwater, high alumina cement, and a soluble phosphate set to form a cementthat exhibits improved carbon dioxide resistance when cured inhydrothermal environments as compared to previously used cementcompositions comprising Portland cement. As used herein, the term “highalumina cement” refers to cement having an alumina concentration in therange of from about 40% to about 80% by weight of the high aluminacement. The high alumina cement generally is a major component of thecost for these cement compositions. To reduce the cost of such cementscompositions, other components may be included in the cement compositionin addition to, or in place of, the high alumina cement. Such componentsmay include fly ash, shale, metakaolin, micro-fine cement, and the like.“Fly ash,” as that term is used herein, refers to the residue from thecombustion of powdered or ground coal, wherein the fly ash carried bythe flue gases may be recovered, for example, by electrostaticprecipitation.

During the manufacture of cement, a waste material commonly referred toas “CKD” is generated. “CKD,” as that term is used herein, refers to apartially calcined kiln feed which is removed from the gas stream andcollected in a dust collector during the manufacture of cement. Usually,large quantities of CKD are collected in the production of cement thatare commonly disposed of as waste. Disposal of the waste CKD can addundesirable costs to the manufacture of the cement, as well as theenvironmental concerns and costs associated with its disposal. Thechemical analysis of CKD from various cement manufactures variesdepending on a number of factors, including the particular kiln feed,the efficiencies of the cement production operation, and the associateddust collection systems. CKD generally may comprise a variety of oxides,such as SiO₂, Al₂O₃, Fe₂O₃, CaO, MgO, SO₃, Na₂O, and K₂O.

SUMMARY

The present invention relates to cementing operations and, moreparticularly, to cement compositions comprising high alumina cement, asoluble phosphate, and CKD, and associated methods of use.

In one embodiment, the present invention provides a method of cementingcomprising: providing a cement composition comprising water, a highalumina cement, a soluble phosphate, and CKD; introducing the cementcomposition into a desired location; and allowing the cement compositionto set in the desired location.

Another embodiment of the present invention provides a method ofcementing comprising: providing a foamed cement composition comprisingwater, a high alumina cement, a soluble phosphate, CKD, a gas, and asurfactant; introducing the foamed cement composition into a desiredlocation; and allowing the foamed cement composition to set in thedesired location.

Another embodiment of the present invention provides a method ofcementing comprising: providing a cement composition comprising water,calcium aluminate, sodium polyphosphate, and CKD; introducing the cementcomposition into a portion of a subterranean formation; and allowing thecement composition to set therein.

The features and advantages of the present invention will be apparent tothose skilled in the art. While numerous changes may be made by thoseskilled in the art, such changes are within the spirit of the invention.

DESCRIPTION OF PREFERRED EMBODIMENTS

The present invention relates to cementing operations and, moreparticularly, to cement compositions comprising high alumina cement, asoluble phosphate, and CKD, and associated methods of use. While thecement compositions of the present invention may be useful in a varietyof subterranean and surface applications, they may be particularlyuseful in primary and remedial cement operations. Furthermore, incertain embodiments, it is believed that the cement compositions of thepresent invention also may be useful applications where resistance tocarbon dioxide is desired, for example, in high temperature wells (e.g.,geothermal wells).

A cement composition of the present invention generally comprises water,a high alumina cement, a soluble phosphate, and CKD. In someembodiments, a cement composition of the present invention may befoamed, for example, comprising water, a high alumina cement, a solublephosphate, CKD, a gas, and a surfactant. A foamed cement composition maybe used, for example, where it is desired for the cement composition tobe lightweight. Other optional additives also may be included in thecement compositions of the present invention as desired, including, butnot limited to, hydraulic cement, fly ash, shale, metakaolin,combinations thereof, and the like.

The cement compositions of the present invention should have a densitysuitable for a particular application as desired by those of ordinaryskill in the art, with the benefit of this disclosure. In someembodiments, the cement compositions of the present invention may have adensity in the range of from about 8 pounds per gallon (“ppg”) to about16 ppg. In the foamed embodiments, the foamed cement compositions of thepresent invention may have a density in the range of from about 8 ppg toabout 13 ppg.

The water used in the cement compositions of the present invention mayinclude freshwater, saltwater (e.g., water containing one or more saltsdissolved therein), brine (e.g., saturated saltwater produced fromsubterranean formations), seawater, or combinations thereof. Generally,the water may be from any source, provided that it does not contain anexcess of compounds that may adversely affect other components in thecement composition. In some embodiments, the water may be included in anamount sufficient to form a pumpable slurry. In some embodiments, thewater may be included in the cement compositions of the presentinvention in an amount in the range of from about 40% to about 200% byweight. As used herein, the term “by weight,” when used herein to referto the percent of a component in the cement composition, means by weightincluded in the cement compositions of the present invention relative tothe weight of the dry components in the cement composition. In someembodiments, the water may be included in an amount in the range of fromabout 40% to about 150% by weight.

The cement compositions of the present invention further comprise a highalumina cement. In some embodiments, a high alumina cement that may besuitable for use comprises a calcium aluminate. The calcium aluminatemay be any calcium aluminate suitable for use as a cement. A suitablecalcium aluminate is SECAR® 60 calcium aluminate, commercially availablefrom Lonestar Lafarge Company. Suitable examples of compositionscomprising high alumina cements useful in subterranean cementingapplications are described in U.S. Pat. Nos. 5,900,053; 6,143,069;6,244,343; 6,332,921; 6,488,763; 6,488,764; 6,796,378; 6,846,357;6,835,243; and 6,904,971, the entire disclosures of which areincorporated herein by reference.

The high alumina cement may be included in the cement compositions ofthe present invention in an amount suitable for a particularapplication. In some embodiments, the high alumina cement may be presentin the cement compositions of the present invention in an amount in therange of from about 20% to about 80% by weight. In some embodiments, thehigh alumina cement may be present in the cement compositions of thepresent invention in an amount in the range of from about 30% to about70% by weight.

The cement compositions of the present invention further comprise asoluble phosphate. Among other things, it is believed that the solublephosphate should react with the high alumina cement to form a set cementthat may be resistant to carbon dioxide. For example, calcium aluminateshould react with sodium polyphosphate to form a calcium phosphatecement. Any type of soluble phosphate may included in the cementcompositions of the present invention, but not limited to, vitreoussodium phosphates, sodium hexametaphosphates, sodium polyphosphates,sodium dihydrogen phosphates, sodium monohydrogen phosphates, andcombinations thereof. Other soluble alkali phosphates also may besuitable for use. A suitable soluble phosphate is commercially availablefrom Astaris LLC, St. Louis, Mo. In some embodiments, the solublephosphate may be present in the cement compositions of the presentinvention in an amount in the range of from about 1% to about 20% byweight. In some embodiments, the soluble phosphate may be present in thecement compositions of the present invention in an amount in the rangeof from about 1% to about 10% by weight.

The cement compositions of the present invention further comprise CKD.The CKD should be included in the cement compositions in an amountsufficient to provide the desired compressive strength, density, and/orcost reduction. In some embodiments, the CKD may be present in thecement compositions of the present invention in an amount in the rangeof from about 5% to 80% by weight. In some embodiments, the CKD may bepresent in the cement compositions of the present invention in an amountin the range of from about 10% to about 50% by weight.

The cement compositions of the present invention may optionally comprisea hydraulic cement. A variety of hydraulic cements may be utilized inaccordance with the present invention, including, but not limited to,those comprising calcium, aluminum, silicon, oxygen, iron, and/orsulfur, which set and harden by reaction with water. Suitable hydrauliccements include, but are not limited to, Portland cements, pozzolanacements, gypsum cements, slag cements, silica cements, and combinationsthereof. In certain embodiments, the hydraulic cement may comprise aPortland cement. In some embodiments, the Portland cements that aresuited for use in the present invention are classified as Classes A, C,H, and G cements according to American Petroleum Institute, APISpecification for Materials and Testing for Well Cements, APISpecification 10, Fifth Ed., Jul. 1, 1990.

Where present, the hydraulic cement generally may be included in thecement compositions in an amount sufficient to provide the desiredcompressive strength, density, and/or cost. In some embodiments, thehydraulic cement may be present in the cement compositions of thepresent invention in an amount in the range of from 1% to about 50% byweight. In some embodiments, the hydraulic cement may be present in thecement compositions of the present invention in an amount in the rangeof from about 5% to about 47.5% by weight.

In some embodiments, a pozzolana cement that may be suitable for usecomprises fly ash. A variety of fly ashes may be suitable, including flyash classified as Class C and Class F fly ash according to AmericanPetroleum Institute, API Specification for Materials and Testing forWell Cements, API Specification 10, Fifth Ed., Jul. 1, 1990. Class C flyash comprises both silica and lime so that, when mixed with water, itsets to form a hardened mass. Class F fly ash generally does not containsufficient lime, so an additional source of calcium ions is required forthe Class F fly ash to form a cement composition with water. In someembodiments, lime may be mixed with Class F fly ash in an amount in therange of from about 0.1% to about 25% by weight of the fly ash. In someinstances, the lime may be hydrated lime. Suitable examples of fly ashinclude, but are not limited to, POZMIX® A cement additive, commerciallyavailable from Halliburton Energy Services, Inc., Duncan, Okla.

Where present, the fly ash generally may be included in the cementcompositions in an amount sufficient to provide the desired compressivestrength, density, and/or cost. In some embodiments, the fly ash may bepresent in the cement compositions of the present invention in an amountin the range of from about 5% to about 60% by weight. In someembodiments, the fly ash may be present in the cement compositions ofthe present invention in an amount in the range of from about 10% toabout 50% by weight.

In certain embodiments, the cement compositions of the present inventionfurther may comprise metakaolin. Generally, metakaolin is a whitepozzolan that may be prepared by heating kaolin clay, for example, totemperatures in the range of from about 600° C. to about 800° C. In someembodiments, the metakaolin may be present in the cement compositions ofthe present invention in an amount in the range of from about 5% toabout 50% by weight. In some embodiments, the metakaolin may be presentin an amount in the range of from about 10% to about 20% by weight.

In certain embodiments, the cement compositions of the present inventionfurther may comprise shale. Among other things, shale included in thecement compositions may react with excess lime to form a suitablecementing material, for example, calcium silicate hydrate. A variety ofshales are suitable, including those comprising silicon, aluminum,calcium, and/or magnesium. An example of a suitable shale comprisesvitrified shale. Suitable examples of vitrified shale include, but arenot limited to, PRESSUR-SEAL® Fine LCM and PRESSUR-SEAL® Coarse LCM,which are commercially available from TXI Energy Services, Inc.,Houston, Tex. Generally, the shale may have any particle sizedistribution as desired for a particular application. In certainembodiments, the shale may have a particle size distribution in therange of from about 37 micrometers to about 4,750 micrometers.

Where present, the shale may be included in the cement compositions ofthe present invention in an amount sufficient to provide the desiredcompressive strength, density, and/or cost. In some embodiments, theshale may be present in an amount in the range of from about 5% to about75% by weight. In some embodiments, the shale may be present in anamount in the range of from about 10% to about 35% by weight. One ofordinary skill in the art, with the benefit of this disclosure, willrecognize the appropriate amount of the shale to include for a chosenapplication.

In certain embodiments, the cement compositions of the present inventionfurther may comprise a set retarding additive. As used herein, the term“set retarding additive” refers to an additive that retards the settingof the cement compositions of the present invention. Suitable setretarding additives may comprise water-soluble hydroxycarboxylic acids,synthetic retarders, lignosulfonates, and combinations thereof. In someembodiments, for example, in high temperature wells, water-solublehydroxycarboxylic acids may be used alone or in combination with anotherset retarding additive. Examples of suitable water-solublehydroxycarboxylic acids include, but are not limited to, gluconic acid,lactic acid, tartaric acid, citric acid, and combinations thereof. Anexample of a suitable water-soluble hydroxycarboxylic acid is HR®-25retarder, commercially available from Halliburton Energy Services, Inc.,Duncan, Okla. Examples of suitable synthetic retarders, include, but arenot limited to, copolymers of 2-acrylamido-2-methylpropane sulfonic acidand acrylic acid, and copolymers of 2-acrylamido-2-methylpropanesulfonic acid and maleic anhydride. Examples of suitable syntheticretarders are SCR®-100 retarder and SCR®-500 retarder, commerciallyavailable from Halliburton Energy Services, Duncan, Okla. In someembodiments, the set retarding additive may be present in an amount inthe range of from about 0.1% to about 5% by weight.

Optionally, other additional additives may be added to the cementcompositions of the present invention as deemed appropriate by oneskilled in the art, with the benefit of this disclosure. Examples ofsuch additives include, but are not limited to, accelerators, weightreducing additives, heavyweight additives, lost circulation materials,fluid loss control additives, dispersants, and combinations thereof.Suitable examples of these additives include crystalline silicacompounds, amorphous silica, salts, fibers, hydratable clays,microspheres, pozzolan lime, latex cement, thixotropic additives,combinations thereof and the like.

An example of a cement composition of the present invention may comprisewater, a high alumina cement, a soluble phosphate, and CKD. Anotherexample of a cement composition of the present invention may comprisewater, a high alumina cement, a soluble phosphate, CKD, and an additivecomprising at least one of the following group: fly ash; shale;metakaolin; and combinations thereof. As desired by one of ordinaryskill in the art, with the benefit of this disclosure, the cementcompositions of the present invention further may comprise any of theabove-listed additives, as well any of a variety of other additivessuitable for use in subterranean applications.

As mentioned previously, in certain embodiments, the cement compositionsof the present invention may be foamed with a gas. In some embodiments,foamed cement compositions of the present invention may comprise water,a high alumina cement, a soluble phosphate, CKD, a gas, and asurfactant. Other suitable additives, such as those discussedpreviously, also may be included in the foamed cement compositions ofthe present invention as desired by those of ordinary skill in the art,with the benefit of this disclosure.

The gas used in the foamed cement compositions of the present inventionmay be any gas suitable for foaming a cement composition, including, butnot limited to, air, nitrogen, or combinations thereof. Generally, thegas should be present in the foamed cement compositions of the presentinvention in an amount sufficient to form the desired foam. In certainembodiments, the gas may be present in the foamed cement compositions ofthe present invention in an amount in the range of from about 10% toabout 80% by volume of the cement composition.

Where foamed, the cement compositions of the present invention furthercomprise a surfactant. In some embodiments, the surfactant comprises afoaming and stabilizing surfactant composition. As used herein, a“foaming and stabilizing surfactant composition” refers to a compositionthat comprises one or more surfactants and, among other things, may beused to facilitate the foaming of a cement composition and also maystabilize the resultant foamed cement composition formed therewith. Anysuitable foaming and stabilizing surfactant composition may be used inthe cement compositions of the present invention. Suitable foaming andstabilizing surfactant compositions may include, but are not limited to:mixtures of an ammonium salt of an alkyl ether sulfate, acocoamidopropyl betaine surfactant, a cocoamidopropyl dimethylamineoxide surfactant, sodium chloride, and water; mixtures of an ammoniumsalt of an alkyl ether sulfate surfactant, a cocoamidopropylhydroxysultaine surfactant, a cocoamidopropyl dimethylamine oxidesurfactant, sodium chloride, and water; hydrolyzed keratin; mixtures ofan ethoxylated alcohol ether sulfate surfactant, an alkyl or alkeneamidopropyl betaine surfactant, and an alkyl or alkene dimethylamineoxide surfactant; aqueous solutions of an alpha-olefinic sulfonatesurfactant and a betaine surfactant; and combinations thereof. In onecertain embodiment, the foaming and stabilizing surfactant compositioncomprises a mixture of an ammonium salt of an alkyl ether sulfate, acocoamidopropyl betaine surfactant, a cocoamidopropyl dimethylamineoxide surfactant, sodium chloride, and water. A suitable example of sucha mixture is ZONESEAL® 2000 foaming additive, commercially availablefrom Halliburton Energy Services, Inc., Duncan, Okla. Suitable foamingand stabilizing surfactant compositions are described in U.S. Pat. Nos.6,797,054, 6,547,871, 6,367,550, 6,063,738, and 5,897,699, the entiredisclosures of which are incorporated herein by reference.

Generally, the surfactant may be present in the foamed cementcompositions of the present invention in an amount sufficient to providea suitable foam. In some embodiments, the surfactant may be present inan amount in the range of from about 0.8% and about 5% by volume of thewater (“bvow”).

The cement compositions of the present invention may be used in avariety of subterranean applications, including, but not limited to,primary cementing and remedial cementing operations. The cementcompositions of the present invention also may be used in surfaceapplications, for example, construction cementing.

An example of a method of the present invention comprises providing acement composition of the present invention comprising water, a highalumina cement, a soluble phosphate, and CKD; placing the cementcomposition in a location to be cemented; and allowing the cementcomposition to set therein. In some embodiments, the location to becemented may be above ground, for example, in construction cementing. Insome embodiments, the location to be cemented may be in a subterraneanformation, for example, in subterranean applications. In someembodiments, the cement compositions of the present invention may befoamed. As desired by one of ordinary skill in the art, with the benefitof this disclosure, the cement compositions of the present inventionuseful in this method further may comprise any of the above-listedadditives, as well any of a variety of other additives suitable for usein subterranean applications.

Another example of a method of the present invention is a method ofcementing in a subterranean formation. An example of such a method maycomprise providing a cement composition of the present inventioncomprising water, a high alumina cement, a soluble phosphate, and CKD;introducing the cement composition into a portion of the subterraneanformation; and allowing the cement composition to set therein. In someembodiments, the portion of the subterranean formation may be a hightemperature subterranean formation. In some embodiments, the portion ofthe subterranean formation may have a temperature in the range of fromabout 200° F. to about 800° F. In some embodiments, the portion of thesubterranean formation may have a temperature in the range of from about300° F. to about 800° F. In some embodiments, the cement compositions ofthe present invention may be foamed. As desired by one of ordinary skillin the art, with the benefit of this disclosure, the cement compositionsof the present invention useful in this method further may comprise anyof the above-listed additives, as well any of a variety of otheradditives suitable for use in subterranean application.

To facilitate a better understanding of the present invention, thefollowing examples of certain aspects of some embodiments are given. Inno way should the following examples be read to limit, or define, thescope of the invention.

EXAMPLE 1

A series of sample cement compositions were prepared at room temperatureand subjected to 72-hour compressive strength tests at 190° F. inaccordance with API Specification 10. Sample No. 1 was a comparativesample that did not comprise CKD.

The results of the compressive strength tests are set forth in the tablebelow. TABLE 1 Unfoamed Compressive Strength Tests 72-Hour SECAR ® 60POZMIX ® A Compressive calcium CKD Cement Soluble Hydrated HR ®-25Citric Strength Density aluminate Class A Additive Phosphate¹ LimeRetarder Acid at 190° F. Sample (ppg) (by wt) (by wt) (by wt) (by wt)(by wt) (by wt) (by wt) (psi) No. 1 15.2 46.57 — 46.57 4.9 — .98 .983,650 No. 2 13 46.57 46.57 — 4.9 — .98 .98 734 No. 3 12.5 46.57 46.57 —4.9 — .98 .98 186.4 No. 4 13 46.57 23.29 23.29 4.9 — .98 .98 Not Set No.5 12.97 46.57 19.61 23.29 4.9 3.67 .98 .98 158 No. 6 14.5 46.57 46.57 —4.9 — .98 .98 919¹The soluble phosphate included in the samples comprised sodiumhexametaphosphate.

EXAMPLE 2

Sample Compositions No. 7 and No. 8 were prepared at room temperatureand subjected to 72-hour compressive strength tests at 190° F. inaccordance with API Specification 10.

Sample Composition No. 7 was a comparative sample that did not compriseCKD. Sample Composition No. 7 comprised 46.57% by weight of SECAR® 60calcium aluminate, 46.57% by weight of POZMIX® cement additive, 4.9% byweight of sodium hexametaphosphate, 0.9% by weight of HR®-25 retarder,0.9% by weight of citric acid, and 2% bvow of ZONESEAL® 2000 foamingadditive. Sample Composition No. 7 was foamed down to a density of about12 ppg.

Sample Composition No. 8 comprised 46.57% by weight of SECAR® 60 calciumaluminate, 46.57% by weight of Class A CKD, 4.9% by weight of sodiumhexametaphosphate, 0.9% by weight of HR®-25 retarder, 0.9% by weight ofcitric acid, and 2% bvow of ZONESEAL® 2000 foaming additive. SampleComposition No. 8 was foamed down to a density of about 12 ppg.

The results of the compressive strength tests are set forth in the tablebelow. TABLE 2 Foamed Compressive Strength Tests 72-Hour SECAR ® 60POZMIX ® A Compressive Base Foam calcium CKD Cement Soluble StrengthDensity Density aluminate Class A Additive Phosphate¹ at 190° F. Sample(ppg) (ppg) (by weight) (by weight) (by weight) (by weight) (psi) No. 715.2 12 46.57 — 46.57 4.9 803 No. 8 13.05 12 46.57 46.57 — 4.9  34.5²No. 8 13.05 12 46.57 46.57 — 4.9 140¹The soluble phosphate included in the samples comprised sodiumhexametaphosphate.²It is believed that this compressive strength test was terminated earlydue to the inadvertent shut off of the hot water bath.

Accordingly, the above examples indicate that foamed and unfoamed cementcompositions comprising water, a high alumina cement, a solublephosphate, and CKD may provide suitable compressive strengths for aparticular application.

Therefore, the present invention is well adapted to attain the ends andadvantages mentioned as well as those that are inherent therein. Theparticular embodiments disclosed above are illustrative only, as thepresent invention may be modified and practiced in different butequivalent manners apparent to those skilled in the art having thebenefit of the teachings herein. Furthermore, no limitations areintended to the details of construction or design herein shown, otherthan as described in the claims below. It is therefore evident that theparticular illustrative embodiments disclosed above may be altered ormodified and all such variations are considered within the scope andspirit of the present invention. In particular, every range of values(of the form, “from about a to about b,” or, equivalently, “fromapproximately a to b,” or, equivalently, “from approximately a-b”)disclosed herein is to be understood as referring to the power set (theset of all subsets) of the respective range of values, and set forthevery range encompassed within the broader range of values. Also, theterms in the claims have their plain, ordinary meaning unless otherwiseexplicitly and clearly defined by the patentee.

1. A method of cementing comprising: providing a cement compositioncomprising water, a high alumina cement, a soluble phosphate, and cementkiln dust; introducing the cement composition into a desired location;and allowing the cement composition to set in the desired location. 2.The method of claim 1 wherein the water comprises at least one of thefollowing group: freshwater; saltwater; a brine; seawater; andcombinations thereof.
 3. The method of claim 1 wherein the high aluminacontent cement comprises a calcium aluminate.
 4. The method of claim 1wherein the high alumina content cement is present in the cementcomposition in an amount in the range of from about 20% to about 80% byweight.
 5. The method of claim 1 wherein the soluble phosphate comprisesat least one of the following group: a vitreous sodium phosphate; asodium hexametaphosphate; a sodium polyphosphate; a sodium dihydrogenphosphate; a sodium monohydrogen phosphate; and combinations thereof. 6.The method of claim 1 wherein the soluble phosphate is present in thecement composition in an amount in the range of from about 1% to about20% by weight.
 7. The method of claim 1 wherein the cement kiln dust ispresent in the cement composition in an amount of about 5% to 80% byweight.
 8. The method of claim 1 wherein the cement composition furthercomprises fly ash.
 9. The method of claim 8 wherein the cementcomposition further comprises a hydrated lime.
 10. The method of claim 1wherein the cement composition further comprises at least one of thefollowing group: hydraulic cement; fly ash; metakaolin; shale; andcombinations thereof.
 11. The method of claim 1 wherein the cementcomposition further comprises vitrified shale.
 12. The method of claim 1wherein the cement composition further comprises at least one of thefollowing group: a set retarding additive; an accelerator; a weightreducing additive; a heavyweight additive; a lost circulation material;a fluid loss control additives; a dispersant; and combinations thereof.13. The method of claim 1 wherein the cement composition furthercomprises at least one of the following group: a crystalline silicacompound; amorphous silica; a salt; a fiber; a hydratable clay; amicrosphere; pozzolan lime; a latex cement; a thixotropic additive; andcombinations thereof.
 14. The method of claim 1 wherein the desiredlocation is above ground or in a subterranean formation.
 15. The methodof claim 1 wherein the desired location is a high temperature well or ageothermal well.
 16. A method of cementing comprising: providing afoamed cement composition comprising water, a high alumina cement, asoluble phosphate, cement kiln dust, a gas, and a surfactant;introducing the foamed cement composition into a desired location; andallowing the foamed cement composition to set in the desired location.17. The method of claim 16 wherein the high alumina content cementcomprises a calcium aluminate.
 18. The method of claim 16 wherein thesoluble phosphate comprises at least one of the following group: avitreous sodium phosphate; a sodium hexametaphosphate; a sodiumpolyphosphate; a sodium dihydrogen phosphate; a sodium monohydrogenphosphate; and combinations thereof.
 19. The method of claim 16: whereinthe high alumina content cement is present in the cement composition inan amount in the range of from about 20% to about 80% by weight; whereinthe soluble phosphate is present in the cement composition in an amountin the range of from about 1% to about 20% by weight; and wherein thecement kiln dust is present in the cement composition in an amount ofabout 5% to 80% by weight.
 20. The method of claim 16 wherein the gascomprises at least one of the following group: air; nitrogen; andcombinations thereof.
 21. The method of claim 16 wherein the surfactantcomprises a foaming and stabilizing surfactant composition.
 22. Themethod of claim 16 wherein the surfactant comprises at least one of thefollowing group: a mixture of an ammonium salt of an alkyl ethersulfate, a cocoamidopropyl betaine surfactant, a cocoamidopropyldimethylamine oxide surfactant, sodium chloride, and water; a mixture ofan ammonium salt of an alkyl ether sulfate surfactant, a cocoamidopropylhydroxysultaine surfactant, a cocoamidopropyl dimethylamine oxidesurfactant, sodium chloride, and water; a hydrolyzed keratin; a mixtureof an ethoxylated alcohol ether sulfate surfactant, an alkyl or alkeneamidopropyl betaine surfactant, and an alkyl or alkene dimethylamineoxide surfactant; an aqueous solution of an alpha-olefinic sulfonatesurfactant and a betaine surfactant; and combinations thereof.
 23. Amethod of cementing comprising: providing a cement compositioncomprising water, calcium aluminate, sodium polyphosphate, and cementkiln dust; introducing the cement composition into a portion of asubterranean formation; and allowing the cement composition to settherein.
 24. The method of claim 23: wherein the calcium aluminate ispresent in the cement composition in an amount in the range of fromabout 20% to about 80% by weight; wherein the sodium polyphosphate ispresent in the cement composition in an amount in the range of fromabout 1% to about 20% by weight; and wherein the cement kiln dust ispresent in the cement composition in an amount of about 5% to 80% byweight.